because their design is fairly standard already to the point where this is not really an engineering issue anymore, its a people issue.
plus it’s not like you could make sweeping changes now if you were inlcined to, because there is just way more inertia against it: better to educate the drivers that make that mix up than ot have every single driver have ot relearn a skill that by now its basically second nature(especially if they drive for a living)
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